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	Provedor de dados ArchiMer (2) Autor Badia, Jacques (1) Bouriel, Luc (1) Guillaud, Jean-francois (1) Martinet, Jean-pierre (1) Prouzet, Patrick (1) Palavra-chave Débit fluvial (2) Age composition (1) Allis shad (1) Alosa alosa (1) Atlantic (1) Atlantique (1) Bretagne (1) Brittany (1) Captures (1) Catch (1) Clupeidae (1) Clupéidés (1) Courant de marée (1) Eutrophication (1) Eutrophisation (1) Fishing effort (1) Flow and tidal currents (1) Grande alose ou alose vraie (1) Multi year trend (1) Multiple regression analysis (1) Mais... Tipo do documento Text (2) Ano 2007 (1) 1994 (1) País France (2) Idioma Francês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Caractérisation biologique et variation des captures de la grande alose (Alosa alosa) par unité d'effort sur le fleuve Adour (Pyrénées Atlantiques, France) ArchiMer Prouzet, Patrick; Martinet, Jean-pierre; Badia, Jacques. The study of logbooks from commercial fishermen on the Adour River and commercial samples allowed characterization of the allis shad population (Alosa alosa L.) caught during the period 1988-91. A better knowledge of the influence of hydroclimatic factors (rate of river flow and intensity of tidal coefficient) on the catchability of the species in that never was also obtained. Allis shad are mainly recruited to this fishery from the beginning of April to the end of May: between 78 and 89 % depending on year. Males in the population were on average younger than females. However, at the same age, males were significantly smaller in size and in weight than females. These results reinforce the knowledge already obtained on French stocks in the Loire and... Tipo: Text Palavras-chave: Alosa alosa; Grande alose ou alose vraie; Clupéidés; Captures; Stock; Pêche; Âge; Débit fluvial; Courant de marée; Atlantique; Alosa alosa; Allis shad; Clupeidae; Catch; Fishing effort; Stock assessment; Age composition; Flow and tidal currents; Atlantic. Ano: 1994 URL: http://archimer.ifremer.fr/doc/00188/29891/28336.pdf Relation concentration-débit et évolution temporelle du nitrate dans 25 rivières de la région Bretagne (France) ArchiMer Guillaud, Jean-francois; Bouriel, Luc. The study of the twenty-five largest rivers of Brittany showed that nitrate concentrations are positively correlated with river flow, in 90 % of the cases. The hydrogeological characteristics of the watersheds had an influence on these relationships. In this respect, river basins characterized by prevalent surficial water runoff exhibited higher correlation coefficients and lower lag times between river flow sequences and nitrate concentrations. The multi-year trend in riverine nitrate concentrations indicated a fourfold increase over 30 years. Nevertheless, 80% of rivers exhibited a recent decrease in nitrate concentrations, independent of inter-annual river flow fluctuations. The highest annual rates of nitrate decrease corresponded to river basins for... Tipo: Text Palavras-chave: Eutrophication; River flow; Multiple regression analysis; Multi year trend; Nitrate; Brittany; Eutrophisation; Débit fluvial; Régression multiple; Évolution pluriannuelle; Nitrate; Bretagne. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2568.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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